systemd: removed requisite=wickedd from wicked.service

This dependency triggers an automatic wicked.service (network)
restart, when the wickedd.service is restarted (bnc#859801).
systemd: removed requisite from wicked@ example too
addrconf: fixed routes memory leak in lease destroy
client: fixed to free details in compat netdev
macvlan: fixed schema and flag handling (fate#315131)
version 0.5.6
dhcp4: use common dhcp4 prefix for dhcp4 specifics
leaseinfo: fixed index increment and ip-addr format

Append a /prefixlen to IPADDR same as in ifcfg files
(fate#316111, comment 13 and 14).
fix byteswap in ipudp_checksum and checksum_partial

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Merge pull request #139 from olafhering/olh-dhcp-endian-bugs